IEC 60227-4:1997 pdf download

IEC 60227-4:1997 pdf download.Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V – Part 4: Sheathed cables for fixed wiring
1General
1.1 Scope
This part of IEC 60227 details the particular specification for light polyvinyl chloride sheathed
cables of rated voltage of 300/500 V.
Each cable shall comply with the appropriate requirements given in IEC 60227-1 and the particular
requirements of this part.
1.2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 60227. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based on
this part of IEC 60227 are encouraged to investigate the possibility of applying the most recent
editions of the normative documents listed below. Members of IEC and ISO maintain registers of
currently valid International Standards.
IEC 60228:1 978, Conductors of insulated cables
IEC 60332-1 :1 979, Tests on electric cables under fire conditions – Part 1 : Test on a single vertical
insulated wire or cable
IEC 6071 9:1 992, Calculation of the lower and upper limits for the average outer dimensions of
cables with circular copper conductors and of rated voltages up to and including 450/750 V
IEC 6081 1 -1 -1 :1 985, Common test methods for insulating and sheathing materials of electric
cables – Part 1 : Methods for general application – Section One: Measuring of thickness and
overall dimensions – Tests for determining the mechanical properties
Amendment 1 (1 988). Amendment 2 (1 989).
IEC 6081 1 -1 -2:1 985, Common test methods for insulating and sheathing materials of electric
cables – Part 1 : Methods for general application – Section Two: Thermal ageing methods
Amendment 1 (1 989).
IEC 6081 1 -1 -4:1 985, Common test methods for insulating and sheathing materials of electric
cables – Part 1 : Methods for general application – Section Four: Tests at low temperature
IEC 6081 1 -3-1 :1 985, Common test methods for insulating and sheathing materials of electric
cables – Part 3: Methods specific to PVC compounds – Section One: Pressure test at high
temperature – Tests for resistance to cracking
IEC 6081 1 -3-2:1 985, Common test methods for insulating and sheathing materials of electric
cables – Part 3: Methods specific to PVC compounds – Section Two: Loss of mass test – Thermal
stability tests.
2 Light polyvinyl chloride sheathed cable
2.1 Code designation
60227 IEC 1 0.
2.2 Rated voltage
300/500 V.
2.3 Construction
2.3.1 Conductor
Number of conductors: 2, 3, 4 or 5.
The conductors shall comply with the requirements of IEC 60228:
– class 1 for solid conductors;
– class 2 for stranded conductors.
2.3.2 Insulation
The insulation shall be polyvinyl chloride compound of type PVC/C applied around each conductor.
The insulation thickness shall comply with the specified value given in table 1 , column 3.
The insulation resistance shall be not less than the value given in table 1 , column 8.
2.3.3 Assembly of cores
The cores shall be twisted together.
2.3.4 Inner covering
The twisted cores shall be covered by an extruded inner covering consisting of an unvulcanized
rubber or plastic compound.
It shall be possible to separate the cores easily.
2.3.5 Sheath The sheath shall be polyvinyl chloride compound of type PVC/ST 4 applied around the inner covering. It shall fit closely and shall be capable of being removed without damage to the inner covering. The sheath thickness shall comply with the specified value given in table 1 , column 5. 2.3.6 Overall diameter The mean overall diameter shall be within the limits given in table 1 , columns 6 and 7. 2.4 Tests Compliance with the requirements of 2.3 shall be checked by inspection and by the tests given in table 2. 2.5 Guide to use Maximum conductor temperature in normal use: 70 °C. NOTE – Other guidelines are under consideration.